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Stock-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2025
Share-Based Payment Arrangement [Abstract] |
Schedule of stock-based compensation included in its condensed consolidated statements of operations and comprehensive income (loss) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Three Months Ended September 30, | ​ | Nine Months Ended September 30,
(in thousands) | 2025 |  | 2024 |  | 2025 |  | 2024
Research and development | $ | 608 | ​ | $ | 3,493 | ​ | $ | 2,449 | ​ | $ | 6,560
General and administrative |  | 1,521 | ​ |  | 3,018 | ​ |  | 6,094 | ​ |  | 9,537
Cost of revenue |  | 67 | ​ |  | — | ​ | ​ | 321 | ​ | ​ | —
Total stock-based compensation | $ | 2,196 | ​ | $ | 6,511 | ​ | $ | 8,864 | ​ | $ | 16,097
Schedule of share-based compensation expense by award type | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Three Months Ended September 30, | ​ | Nine Months Ended September 30,
(in thousands) | 2025 | ​ | 2024 | ​ | 2025 | ​ | 2024
Earn-Out Restricted Shares | $ | — | ​ | $ | 1,997 | ​ | $ | — | ​ | $ | 1,997
Restricted Stock Units ("RSUs") | ​ | 1,774 | ​ | ​ | 3,404 | ​ | ​ | 6,545 | ​ | ​ | 10,093
Performance Stock Units ("PSUs") | ​ | 176 | ​ | ​ | 582 | ​ | ​ | 1,089 | ​ | ​ | 2,214
Restricted Stock Awards ("RSAs") | ​ | 245 | ​ | ​ | 486 | ​ | ​ | 1,197 | ​ | ​ | 1,464
Stock options | ​ | 1 | ​ | ​ | 42 | ​ | ​ | 33 | ​ | ​ | 329
Total | $ | 2,196 | ​ | $ | 6,511 | ​ | $ | 8,864 | ​ | $ | 16,097

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- Definition Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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